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selftests: KVM: s390: check for registers to NOT change on reset

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Normal reset and initial CPU reset do not clear all registers. Add a
test that those registers are NOT changed.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Christian Borntraeger 2020-03-10 09:01:42 -04:00 committed by Paolo Bonzini
parent b0435a12a6
commit 3203a01737
1 changed files with 53 additions and 2 deletions
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55
tools/testing/selftests/kvm/s390x/resets.c
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@ -40,8 +40,22 @@ static void guest_code_initial(void)
" lctlg 8,8,%1\n" " lctlg 8,8,%1\n"
" lctlg 10,10,%2\n" " lctlg 10,10,%2\n"
" lctlg 11,11,%3\n" " lctlg 11,11,%3\n"
: : "m" (cr2_59), "m" (cr8_63), "m" (cr10), "m" (cr11) : "2"); /* now clobber some general purpose regs */
GUEST_SYNC(0); " llihh 0,0xffff\n"
" llihl 1,0x5555\n"
" llilh 2,0xaaaa\n"
" llill 3,0x0000\n"
/* now clobber a floating point reg */
" lghi 4,0x1\n"
" cdgbr 0,4\n"
/* now clobber an access reg */
" sar 9,4\n"
/* We embed diag 501 here to control register content */
" diag 0,0,0x501\n"
:
: "m" (cr2_59), "m" (cr8_63), "m" (cr10), "m" (cr11)
/* no clobber list as this should not return */
);
} }
static void test_one_reg(uint64_t id, uint64_t value) static void test_one_reg(uint64_t id, uint64_t value)
@ -98,6 +112,21 @@ static void assert_clear(void)
"vrs0-15 == 0 (sync_regs)"); "vrs0-15 == 0 (sync_regs)");
} }
static void assert_initial_noclear(void)
{
TEST_ASSERT(sync_regs->gprs[0] == 0xffff000000000000UL,
"gpr0 == 0xffff000000000000 (sync_regs)");
TEST_ASSERT(sync_regs->gprs[1] == 0x0000555500000000UL,
"gpr1 == 0x0000555500000000 (sync_regs)");
TEST_ASSERT(sync_regs->gprs[2] == 0x00000000aaaa0000UL,
"gpr2 == 0x00000000aaaa0000 (sync_regs)");
TEST_ASSERT(sync_regs->gprs[3] == 0x0000000000000000UL,
"gpr3 == 0x0000000000000000 (sync_regs)");
TEST_ASSERT(sync_regs->fprs[0] == 0x3ff0000000000000UL,
"fpr0 == 0f1 (sync_regs)");
TEST_ASSERT(sync_regs->acrs[9] == 1, "ar9 == 1 (sync_regs)");
}
static void assert_initial(void) static void assert_initial(void)
{ {
struct kvm_sregs sregs; struct kvm_sregs sregs;
@ -140,6 +169,14 @@ static void assert_initial(void)
test_one_reg(KVM_REG_S390_CLOCK_COMP, 0); test_one_reg(KVM_REG_S390_CLOCK_COMP, 0);
} }
static void assert_normal_noclear(void)
{
TEST_ASSERT(sync_regs->crs[2] == 0x10, "cr2 == 10 (sync_regs)");
TEST_ASSERT(sync_regs->crs[8] == 1, "cr10 == 1 (sync_regs)");
TEST_ASSERT(sync_regs->crs[10] == 1, "cr10 == 1 (sync_regs)");
TEST_ASSERT(sync_regs->crs[11] == -1, "cr11 == -1 (sync_regs)");
}
static void assert_normal(void) static void assert_normal(void)
{ {
test_one_reg(KVM_REG_S390_PFTOKEN, KVM_S390_PFAULT_TOKEN_INVALID); test_one_reg(KVM_REG_S390_PFTOKEN, KVM_S390_PFAULT_TOKEN_INVALID);
@ -176,7 +213,13 @@ static void test_normal(void)
inject_irq(VCPU_ID); inject_irq(VCPU_ID);
vcpu_ioctl(vm, VCPU_ID, KVM_S390_NORMAL_RESET, 0); vcpu_ioctl(vm, VCPU_ID, KVM_S390_NORMAL_RESET, 0);
/* must clears */
assert_normal(); assert_normal();
/* must not clears */
assert_normal_noclear();
assert_initial_noclear();
kvm_vm_free(vm); kvm_vm_free(vm);
} }
@ -192,8 +235,13 @@ static void test_initial(void)
inject_irq(VCPU_ID); inject_irq(VCPU_ID);
vcpu_ioctl(vm, VCPU_ID, KVM_S390_INITIAL_RESET, 0); vcpu_ioctl(vm, VCPU_ID, KVM_S390_INITIAL_RESET, 0);
/* must clears */
assert_normal(); assert_normal();
assert_initial(); assert_initial();
/* must not clears */
assert_initial_noclear();
kvm_vm_free(vm); kvm_vm_free(vm);
} }
@ -209,9 +257,12 @@ static void test_clear(void)
inject_irq(VCPU_ID); inject_irq(VCPU_ID);
vcpu_ioctl(vm, VCPU_ID, KVM_S390_CLEAR_RESET, 0); vcpu_ioctl(vm, VCPU_ID, KVM_S390_CLEAR_RESET, 0);
/* must clears */
assert_normal(); assert_normal();
assert_initial(); assert_initial();
assert_clear(); assert_clear();
kvm_vm_free(vm); kvm_vm_free(vm);
} }